Reservoir levels

Keep track of reservoir levels, see how much water is being used and view our annual water outlooks here.

The Western Water region has two main water storages, Rosslynne Reservoir and Merrimu Reservoir, both of which are managed by Southern Rural Water. These reservoirs supply the Melton and Bacchus Marsh (Merrimu) and Macedon Ranges and Sunbury (Rosslynne) districts.

Western Water manages a number of smaller reservoirs in and around the Macedon Ranges. The region is also connected to the Melbourne water supply which can be used when local supplies are low.

Local reservoir levels

This graph displays combined water levels in local reservoirs. For individual reservoirs please click on the tabs below.

Average residential water use (litres per person per day)

Merrimu Reservoir

Capacity: 32,516 ML

Rosslynne Reservoir

Capacity: 25,400 ML

Garden Hut Reservoir & Lancefield Service Basin (Lancefield)

Capacity: 112 ML

Campaspe Reservoir, Graham Brock Reservoir and Reservoir C (Woodend)

Capacity: 361 ML

Kerrie Reservoir and Glenfern Basin (Romsey)

Capacity: 341.5 ML

Pykes Creek Reservoir

Capacity: 22,119 ML

Surcharging and pre-release policy

Western Water’s surcharge and pre-release infrastructure associated with its water storage dams and reservoirs is very limited, and as such Western Water is not in a position to undertake any surcharge or pre-release prior to flood events.

Western Water’s storages are equipped with spillways which allow flood waters to spill from the storage if it is at full capacity. Western Water will monitor storages during and post flood events and will respond as required.

Annual Water Outlooks

Annual Water Outlooks include an update on the status of our water supply systems and forecast the expected performance for the year ahead.

Western Water monitors actual performance of its water supplies during the year due to the variable nature of rainfall in the region.